APA aipamena

van Nispen, R. M., Knol, D. L., Langelaan, M., & van Rens, G. H. (2011). Re-evaluating a vision-related quality of life questionnaire with item response theory (IRT) and differential item functioning (DIF) analyses. BioMed Central.

Chicago Style aipamena

van Nispen, Ruth MA, Dirk L. Knol, Maaike Langelaan, and Ger HMB van Rens. Re-evaluating a Vision-related Quality of Life Questionnaire With Item Response Theory (IRT) and Differential Item Functioning (DIF) Analyses. BioMed Central, 2011.

MLA aipamena

van Nispen, Ruth MA, Dirk L. Knol, Maaike Langelaan, and Ger HMB van Rens. Re-evaluating a Vision-related Quality of Life Questionnaire With Item Response Theory (IRT) and Differential Item Functioning (DIF) Analyses. BioMed Central, 2011.